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External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations

Johnson, Magnus L.; Dobson, Nicola; De Grave, Sammy

Authors

Nicola Dobson

Sammy De Grave



Abstract

Most caridean decapods have compound eyes of the reflecting superposition kind, and additionally some possess an accessory eye-like organ of unknown function, also referred to as the nebenauge.We examined 308 caridean genera to assess the general morphology of the eye, rostrum length, eye diameter and the presence or absence and, when present, the diameter of the nebenauge.We have attempted to relate these data to ecological and taxonomic considerations.We consider there to be 6 distinct eye types based on the margin between the eyestalk and cornea. The presence of nebenaugen appears to be generally linked to an active lifestyle, as evidenced by the fact that species that have nebenaugen tend to have larger eyes and are more likely to have a distinct rostrum.We suggest that the inconsistencies in its presence/absence under both systematic and ecological lenses may indicate that when present it has various roles relating to behavioural and physiological rhythms.

Citation

Johnson, M. L., Dobson, N., & De Grave, S. (2015). External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations. PeerJ, 3(8), e1176. https://doi.org/10.7717/peerj.1176

Acceptance Date Jul 21, 2015
Online Publication Date Aug 18, 2015
Publication Date Aug 18, 2015
Deposit Date Mar 30, 2016
Publicly Available Date Mar 30, 2016
Journal PeerJ
Electronic ISSN 2167-8359
Publisher PeerJ
Peer Reviewed Peer Reviewed
Volume 3
Issue 8
Pages e1176
DOI https://doi.org/10.7717/peerj.1176
Keywords Acessory ocellus; Nebenauge; Eye morphology; Doppleugen; Compound eye; Decapod; Shrimp; Vision
Public URL https://hull-repository.worktribe.com/output/434256
Publisher URL https://peerj.com/articles/1176/
Copyright Statement © 2015 Johnson et al. Distributed under Creative Commons CC-BY 4.0
Additional Information Copy of article : Johnson ML, Dobson N, De Grave S. (2015) External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations. PeerJ 3:e1176 https://doi.org/10.7717/peerj.1176

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Copyright Statement
© 2015 Johnson et al. Distributed under Creative Commons CC-BY 4.0





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